function imageUtil(e) {
	var imageSize = {};
	var originalWidth = e.detail.width;//图片原始宽  
	var originalHeight = e.detail.height;//图片原始高  
	var originalScale = originalHeight / originalWidth;//图片高宽比  
	console.log('originalWidth: ' + originalWidth)
	console.log('originalHeight: ' + originalHeight)
	//获取屏幕宽高  
	wx.getSystemInfo({
		success: function (res) {
			var windowWidth = res.windowWidth;
			var windowHeight = res.windowHeight;
			var windowscale = windowHeight / windowWidth;//屏幕高宽比  
			console.log('windowWidth: ' + windowWidth)
			console.log('windowHeight: ' + windowHeight)
			if (originalScale < windowscale) {//图片高宽比小于屏幕高宽比  
				//图片缩放后的宽为屏幕宽  
				imageSize.imageWidth = windowWidth;
				imageSize.imageHeight = (windowWidth * originalHeight) / originalWidth;
			} else {//图片高宽比大于屏幕高宽比  
				//图片缩放后的高为屏幕高  
				imageSize.imageHeight = windowHeight;
				imageSize.imageWidth = (windowHeight * originalWidth) / originalHeight;
			}

		}
	})
	console.log('缩放后的宽: ' + imageSize.imageWidth)
	console.log('缩放后的高: ' + imageSize.imageHeight)
	return imageSize;
}

module.exports = {
	imageUtil: imageUtil
}  